Apparatus for displacing the chain walls of tenter frames



H. FAZIS 3,150,431

APPARATUS FOR DISPLACING THE CHAIN-WALLS 0F TENTER FRAMES Sgpt. 29, 1964 Filed May 14, 1962 uvmyrm I- mew T1 fizz i BY 1 Wm m i United States Patent Oflice 3,150,431 Patented Sept. 29, 1964 3,150,431 APPARATUS ,FOR DISPLACING THE CHAIN- WALLS OF TENTER FRAMES Hermann Fazis, Wei] (Rhine), Germany, assignor to Farherei und Appretur Schusterinsel G.m.h.H., Weil (Rhine), Germany, a corporation of Germany Filed May 14, 1962, Ser. No. 194,230 Claims priority, application Germany, May 19, 1961, F 33,969 3 Claims. (Cl. 26-57) The invention relates to machines for the treatment of webs of textile material and is connected with the construction of the feeding devices thereon, especially the driving mechanism for pivoting the feeding chain walls on tenter or stretching frames. In the machines in general use today, the driving mechanism for each chain wall is composed of a stationary motor which is electrically reversible or provided with a reversible magnetic clutch, cooperating with a spindle and travelling nut system. It has been found in practice that the responding speed in this construction is limited due to the comparatively large masses moved and friction. The effect of temperature, particularly in the case of long tenter or stretching frames, can cause disalignment and stressing of the textile material which also results in increased friction.

The object of the invention is to produce a driving mechanism remarkable particularly for its sensitivity and high responding speed but nevertheless reliable in operation even in the case of stressing of the textile material due to high temperature, yet of simple and well arranged construction. The invention is characterized in that, in the case of pivoted feeding chain walls mounted at their free ends on rollers or the like in known manner, the drive for the pivoting thereof is through at least one of these rollers. In the preferred embodiment of the invention in which a separate motor is coordinated to each feeding chain wall in known manner, the driving motor is, according to the invention, mounted on the feeding chain wall itself. This motor can be a motor which is reversible for forward and reverse running, but is preferably a driving motor which is equipped with a magnetic clutch such as already in use on tenter or stretching frames, one half of this clutch being arranged to rotate permanently with the motor. Compared with the construction of a conventional reversible motor, this arrangement possesses the advantage that, at the moment of coupling or changing over, the live force of the rotating motor armature and clutch half is available so that the motor can be of lighter construction. In general, the invention possesses the advantage that by considerably reducing the amount of the moved masses and the friction, the sensitivity, speed of response and lateral pivoting speed of the mechanism can be increased considerably.

Other features of the invention are hereinafter described with the aid of embodiments illustrated by way of example in the accompanying drawing, in which FIG. 1 is a plan view of the entrance end of a tenter or stretching frame, showing only one of the two feeding chain walls associated therewith, and a driving mechanism for one of the supporting rollers thereof. It is to be understood that the other of the feeding chain walls, not illustrated, is identical to and a mirror image of that shown.

FIG. la is a plan view similar to FIG. 1 showing a driving mechanism acting on both supporting rollers of the single feeding chain wall illustrated, and

FIG. 2 is a side elevation of FIG. 1.

The entrance of the stretching frame is designated by 10. The feeding chain walls 11, only one of which is shown in FIG. 1, are connected to the frame by means of pivot bolts 13. The feeding chain walls 11 are supported at their free ends, at which they carry the sprocket wheels 15, by means of pairs of rollers 17, 18, resting on a hearing surface 21 formed on the upper flange of a channel bar 22. On the under side of the feeding chain walls, brackets 23 are fixed; in the example illustrated each carries an electrically reversible driving motor 25 for the respective feeding chain wall. Transmission gears 27 are coordinated to each of the motors 25.

In the single chain wall illustrated in FIG. 1, a Cardan shaft 29, 30 extends from the transmission gear 27 and is connected at its end to a roller 18. The driving motor 25 picks up control impulses from the photo-electric cell control system designated by 31, the construction of which is known to those versed in the art, and swings the feeding chain wall 11 accordingly in clockwise or counterclockwise direction.

In a second embodiment, a similar system 31 is coordinated to the driving motor 26 for a feeding chain wall 12, as shown in FIG. la. Here the Cardan shaft 32, 33 is coordinated to the gear 28 and drives the roller 19. However, a chain drive 34 extends from the cardan shaft 32, 33 to a second Cardan shaft 35, 36 connected with the roller 20. Both supporting rollers 19 and 20 are thus driven by the motor 26 of feeding chain Wall 12. In other respects the construction is the same as that of the feeding chain wall 11 of FIG. 1.

In the case of the transmission gear, which is itself of conventional type, and as to the other parts of the driving system, importance is attached to particularly light construction. In the embodiment illustrated an electric motor with 0.1 kw. and a speed of 11,000 r.p.m. is employed.

I claim:

1. In combination, in a tenter frame for textile material, a pair of elongated feeding chain walls, each of said walls pivotally attached to said frame at one end and supported at the opposite end thereof by a pair of spaced rollers mounted therebeneath, a supporting surface beneath said chain walls and normal thereto for supporting the rollers of each wall, means for independently pivoting each of said Walls about the pivot axis thereof in response to lateral deviations of the textile material comprising a reversible driving motor stationarily mounted on each wall and a power transmission operatively connecting the motor to at least one roller of each pair to positively and directly rotate the same to move the corresponding wall along the supporting surface, and means for detecting lateral deviations in the textile material and actuating the motors accordingly.

2. In combination, in a tenter frame for textile material, a pair of elongated feeding chain walls, each of said walls pivotally attached to said frame at one end and supported at the opposite end thereof by at least one roller mounted therebeneath, a supporting surface beneath said chain walls and normal thereto for supporting the roller of each wall, means for independently pivoting each of said walls about the pivot axis thereof in response to lateral deviations of the textile material comprising a reversible driving motor stationarily mounted on each wall and a power transmission operatively connecting the motor to the roller to positively and directly rotate the same to move the corresponding wall along the supporting surface, and means for detecting lateral deviations in the textile material and actuating the motors accordingly.

3. In combination, in a tenter frame for textile material, a pair of elongated feeding chain walls, each of said walls pivotally attached to said frame at one end and supported at the opposite end thereof by. at least one roller mounted therebenea'th, a supporting surfacebeneath said chain Wallsand normal thereto for supporting the roller of each wall, means for independently pivoting each of said Walls about the pivot axis thereof in response to lateral deviations of the textile material comprising a reversible driving motor and a flexible power transmission operatively connecting the motor to the roller to positively and directly rotate the same to move the corresponding Wall along the supporting surface, and means for detecting lateral deviations in the textile material and actuating the motors accordingly.

France Oct. 29, 1952 Great Britain Oct. 7, 1938 

2. IN COMBINATION, IN A TENTER FRAME FOR TEXTILE MATERIAL, A PAIR OF ELONGATED FEEDING CHAIN WALLS, EACH OF SAID WALLS PIVOTALLY ATTACHED TO SAID FRAME AT ONE END AND SUPPORTED AT THE OPPOSITE END THEREOF BY AT LEAST ONE ROLLER MOUNTED THEREBENEATH, A SUPPORTING SURFACE BENEATH SAID CHAIN WALLS AND NORMAL THERETO FOR SUPPORTING THE ROLLER OF EACH WALL, MEANS FOR INDEPENDENTLY PIVOTING EACH OF SAID WALLS ABOUT THE PIVOT AXIS THEREOF IN RESPONSE TO LATERAL DEVIATIONS OF THE TEXTILE MATERIAL COMPRISING A REVERSIBLE DRIVING MOTOR STATIONARILY MOUNTED ON EACH WALL AND A POWER TRANSMISSION OPERATIVELY CONNECTING THE MOTOR TO THE ROLLER TO POSITIVELY AND DIRECTLY ROTATE THE SAME TO MOVE THE CORRESPONDING WALL ALONG THE SUPPORTING SURFACE, AND MEANS FOR DETECTING LATERAL DEVIATIONS IN THE TEXTILE MATERIAL AND ACTUATING THE MOTORS ACCORDINGLY. 